Online co-op Investigation games

Every online co-op Investigation game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 71–80 of 178 games matching Investigation · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
42% of 85

Crack the Mystery Together! "Lateral Thinking Together" is a cooperative and competitive online multiplayer game that challenges your knowledge and deductive reasoning to uncover the truth. Solve incomprehensible stories with creative thinking and flashes of insight!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
81% of 777

An online co-op horror game featuring unique playable characters and RPG mechanics. Exorcise ghosts using your special abilities and tools while surviving the supernatural onslaught

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
91% of 12

You’re not alone. You’re just the only one watching. Welcome to Spectator 3—the next evolution in psychological horror. Scan the feeds, spot the impossible, and hold reality together—before it falls apart!

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
53% of 82

A 1-4 player co-op horror game where you must outsmart a monster that adapts to your every move. Enter a volatile Rift with shifting maps and objectives, scavenge rare resources, and extract together… or betray your friends for the lion’s share of the loot.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 1

4-player online co-op horror game set in procedurally generated abandoned mines. Investigate, restore power, and survive as you face a monster with unique forms, using equipment to complete objectives and refine your strategy.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
85% of 60

They See Us is a multiplayer horror game built for creepy vibes, scream-worthy jump scares and hilarious co-op tension. Work together to spot terrifying anomalies lurking in familiar places – before they find you!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 4

A co-op horror about investigating and recording aliens. Turn in your recordings to the Colony for a reward. You keep the recordings you make whether you die or survive.

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$
Released
Price
$ · Cheap
Players
👥 Up to 12 players
Reviews
83% of 1,393

A terrifying multiplayer horror experience with social deduction elements. Trapped in the Backrooms, up to 12 players must try to work together to survive and expose the shapeshifting Skin Stealer hiding among them before it’s too late. Who will you trust?

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